wow, UNHATCHED, that is cool; I'm pretty convinced now that the woman Jack's dad went to see is Claire's mother, thus Claire is Jack's half-sister. Their exchange kind of implied that the daughter was in the house, but maybe he was just trying to get in so he could get info on where Claire was living; maybe he didn't know where she lived now, so he was going to the last place he knew about - the house he was paying for where both Claire and her mother used to live together, but now Claire has moved out.